"Get Waveform Subset": version incompatibility

Hello everybody!
I was studing an already developped software and there was something relative to waveform uses that I didn't get it (concretly it was that I didn't know very well what I have to put in the Duration input when I was using the Get Waveform Subset function in the Relative Time mode. Should the duration be "T0 + sth" or just "sth"?)
Then, to understand it, I tried to simulated it. I was working at the same time with 2 computers with 2 different versions of Labview (7.1 and 8.6). The funny thing is that I created exactly the same VI for the oldest version and the new one, however it only works for the oldest one. When I try to run the new version I get that mistake message:
"Error -1801 occurred at Start value too large in Get Waveform Subset.VI.
Possible reason(s):
LabVIEW:  (Hex 0xFFFFF8F7) Duration input is not an integer multiple of dt. Value was coerced to nearest integer multiple of dt."
What's wrong with my new Labview version subvi?
Thank you!!
Attachments:
8.6 version.JPG ‏18 KB
7.1 version.JPG ‏41 KB

GovBob,  
 Thanks a lot for your solution. Writing zero in the start input it does work.  However there are 2 things I don't understand: 
1-.Why does it work in the oldest version using the  elapsed second function?Is the output of this function a longer number now? I think it should also work for the newest versions.
 2-.If we can't write a time stamp, what do we have to do to skip the samples of a period of time? If we use like a starting time zero, what is the difference now between the relative time mode and the sample one? 
 I have wondered that, and I have been doing some tests and now I am more confused that before I was. :s  
First of all, I was thinking: If we don't want to skip the first samples is logical that it does work for zero. I imagined that if for instance our wave starts in the second number 1000, so if we write a number below 1000, we are going to get always samples from the first positions (we could also get samples from other position but the first one would be always in the output wave).However when I wrote a signal, using as a t0 the elapsed second function and dt:1. Then I used "get waveform subset" in the relative time mode, and I set start:1 and duration:1, I got the second sample instead of the first one. (I was expecting the first one for the reason I have already explained) 
Also, thinking about the behaviour of the function in the relative time mode I have done some test, in order to get a pattern, but I haven't successed. I will attached a file with the ideas got from the tests.
Attachments:
subwaveform.txt ‏3 KB

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